Enterprise COBOL for z/OS, Version 4.2, Programming Guide

To use relative-record data sets (RRDS) that have variable-length records, you must use VSAM variable-length RRDS support.

Do these steps:

1. Define the file with the ORGANIZATION IS RELATIVE clause.
2. Use FD entries to describe the records with variable-length sizes.
3. Use the NOSIMVRD runtime option.
4. Define the VSAM file through access-method services as an RRDS.

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